Teach the preload scanner about the 'nonce' attribute.

third_party/WebKit/Source/core/html/parser/PreloadRequest.cpp

Index: third_party/WebKit/Source/core/html/parser/PreloadRequest.cpp
diff --git a/third_party/WebKit/Source/core/html/parser/PreloadRequest.cpp b/third_party/WebKit/Source/core/html/parser/PreloadRequest.cpp
index 8093323e3e45cd3131889357fbaa15efb87494b4..0071af1cd4e60e556b5764f3870f69afc639eb61 100644
--- a/third_party/WebKit/Source/core/html/parser/PreloadRequest.cpp
+++ b/third_party/WebKit/Source/core/html/parser/PreloadRequest.cpp
@@ -47,6 +47,7 @@ FetchRequest PreloadRequest::resourceRequest(Document* document)
     request.setResourceWidth(m_resourceWidth);
     request.clientHintsPreferences().updateFrom(m_clientHintsPreferences);
     request.setIntegrityMetadata(m_integrityMetadata);
+    request.setContentSecurityPolicyNonce(m_nonce);
 
     if (m_requestType == RequestTypeLinkRelPreload)
         request.setLinkPreload(true);